Needle plate for fur-sewing machines



' e H- Ross NEEDLE PLATE FOR FUR SEWING MACHINES Filed Aug. 18. 1926 INVENTOR z: FLIIL,

FllillllI A TTOHNEY to a source of power not shown.

Patented June 7, 1927.

UITED STATES PATENT OFFICE.

EAR-RY ROSS, OF NEW YORK, N. Y., ASSIG-NOR TO FUR GUIDE MACHINE CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEV YORK.

NEEDLE PLATE FOR FUR-SEWING MACHINES.

Application filed August 18, 1926.

This invention relates to improvements in needle plates, and more. particularly to needle plates used in fur sewing machines, as for instance, in the type of machine as shown in my Patent $51,541,751 issued June 9, 1925.

The main object of the invention is to provide means in a machine of this nature that will prevent the breaking of needles and the resultant loss of time in replacing and rethreading of the new needle.

iinotherobject of the invention is to provide means for preventing the driven feed disk in a machine of this nature from tipping and rising on its bearing when the said bearing becomes worn.

A further object of the invention is to provide means for positively locating the needle plate in relation to the needle.

A still further object of the invention is to provide means for automatically expelling any dirt that may accumulate on the surface of the driven disk and prevent same from entering the disk bearing.

Other objects and novel features of my invention will become apparent as the specification proceeds.

In the drawings forming a part of this specification Figure l is a view in side elevation of a machine of the type shown in my Patent #1,5t-1,7 51 and Figure 2 is a top plan view of the feeding disks portion of the machine.

Figure 3 is a section taken on line 3 3, Figure 2.

Figure 4 is a top plan view of my improved needle plate and Figure 5 is a section taken on line 5-5, Figure 4.

Referring to the drawings in detail in which like numerals refer to the same parts throughout the several views, indicates a fur sewing machine provided with a fly wheel 11 on a shaft 11 suitably connecteu A needle bar 12 having a needle 13 is operated for sewing from the said shaft 11 by the means shown in my Patent #1.541,751. A feed disk 1% suitably mounted is driven in step by stop motion by any suitable means (not shown) as the said means forms no part of my invention. Co-operating with the said feed disk 14 a driven disk 15 normally held in resilient contact with the disk 14 by Serial No. 129,898.

a spring 16 on a rod 17 slidingly supported in the walls 18 and 19 of the frame of the machine. F bred to a bracket 20 is an arm 21' provided with a stud 22 upon which the disk 15 is rotatably mounted. The said bracket 20 is prevented from turning by means of a lower rod 17 fixed thereto and supported in the walls 18 and 19 of the frame of the machine.

As heretofore mentioned the disk 15 is r0- ta-tably mounted upon the stud 22 and is provided with a roller bearing It is customary when feeding two strips of fur of uneven length between the disks 14 and 15, to form a collar or the like, to retard the feeding movement'of the disk 15 agalnst which the shorter strip of fur bears by eX- erting a pressure against the said disk by the hand of the operator. The said pressure together with the normal rotation of the disk 15 causes considerable wear on the roller bearing with a consequent tipping upwardly of the inwardly disposed portion of the periphery of the disk 15 causing the needle 13 to strike the said disk and the said impact will cause the needle to break. To prevent the said tipping of the disk and consequent breaking of the needle, I have pr0- vided the usual needle plate 25 with a groove 26 cut across its lower surface, and two short grooves 27 in its upper surface. Into the said grooves 26 and 27 I insert a spring member 28 which exerts a downward pressure against the disk 15 and prevents same from tipping upwardly in the path of the needle. The needle plate is secured to the stud 22 by a screw 29.

Another cause for the breaking of the needle is the fact that the said screw 29 becomes loose, thus allowing the needle plate to become displaced, and bring the solid edges 30 of the said needle plate into the path of the needle and break the said needle when it comes into contact with the said edges instead of with the usual groove 31 provided in the said needle plate.

To prevent the said needle plate from coming out of proper alinement, the needle plate 25 is provided with an arm 25 integral therewith or otherwise secured thereto, having a projection 32 thereon fitting into a vertical groove 83 in the bracket 20. It will readily be seen that this arrangement will prevent any rotation of the needle plate on the screw 29 and will at all times mainill iii)

tain the groove in the needle plate in proper alinenient with the needle and prevent the breaking of the needle. To prevent any undue wear of-the roller bearing caused by any particles of furor dirt getting into the said hearing, I provide slots or openings 35 in the base of the disk 15; In Fig. 3 of the drawing I have shown the needle plate25 undercut or spaced above the recessed surface of the disk 15. This space in actual practiceis only three or four thousandths o't aniiichto permit of aslight tensioning of thespring 28 when the disk tends to tip'upw'ardlya nd to permit for slight variations the thickness of the spring material. For clearness illustration, this space has been egagg'eiated. The distance between the needle and the top surface ot' the disk is always greater than the distance between the ot-tom oftheneedle plate and the recessed'suffaceof the disk. It will be seen that, as the disk 15 revolves inthe direction of;th e arrow, any dirt or particles of fur aiga til like on the the disk will'be swept Qutthr'ough the said openings by the needle plate 25. H v a.

From the 'fo fegoing it fwill be seen that I have'provided positive means to prevent any a wnra tipping or the'disk into the path of the edlamean for positively alinin'g and in inta'iiiiiig the needle plate in proper posinon at 3 11 times top'revent any breaking of tlieiiee'dle, andthat I have provided means i f' "ng'the disk bearing tree from any 1, ign matter, thus reducing thewearon thesa'id ,bearin Having despi'ibed my invention, What I claiin as new 1s LfI'na se wing inachine, a bearing, a n aterial feeding disk, rotatably mounted on the the disk to prevent the said disk from tipping upwardly into the path of the needle. 2. In a sewing machine, a bracket having a slot therein, a hearing post in said bracket,

a feeding disk rotatably mounted on the hearing; post, a needle plate mounted on said post. a reciprocating needle associated with the said plate, a groove in the needle plate in the path. of the travel of the needle, and an arm on the needle plate fitting into the slot in the bracket to maintain the needle plate in proper radial alinement with the needle.

in a sewing machine. a bracket, a bearing; post in said bracket, a feeding disk rotatably mounted on the bearing post, a needle plate mounted on said post, a reciprocating needle associated with the said plate, a groove in the needle plate in thepath of the travel of the needle, a resilient member-on the needle plate bearing against the disk to prevent the disk. trointipping into thejpath oithe needle and an arm onthe needle plate fitting into a slot in thebr acket'to maintain the needle plate in proper alinei'nent with the needle. I v I p H 4. in a sewing machine a bearing post, a mater ialffeeding disk having openings therein, rolatably mounted on the post, and a needle plate n'iounted on the post adapted to sweep any foreign matter on the disk through the said'openings. I p

In testimony whereof I hereunto my 5 l gn a tu re.

'LHARRY Ross.

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